分振幅偏振成像相机标定方法研究  

Calibration Methods of Amplitude-division Polarization Imaging Camera

作　　者：李松 张然 陈永台 褚金奎[1] LI Song;ZHANG Ran;CHEN Yong‒tai;CHU Jin‒kui(Microsystem Research Center,School of Mechanical Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China)

机构地区：[1]大连理工大学机械工程学院微系统研究中心,辽宁大连116024

出　　处：《光子学报》2020年第7期135-142,共8页Acta Photonica Sinica

基　　金：国家自然科学基金(No.51675076);中国高校基本科研业务费(No.DUT17GF109)。

摘　　要：在分振幅偏振成像探测器标定过程中,针对标定系统引入的误差和探测器自身误差的超多影响因素的强耦合问题,提出采用一种非线性最小二乘拟合法,将探测器与标定系统的主要误差影响因素以未知参数的方式代入拟合方程中进行标定计算.在波段为532 nm的入射光源下,对标定后探测器的精度进行了验证.探测线偏振光的偏振角误差在0.2°以内,线偏振度误差在2.5%以内,探测左右旋圆偏振光的圆偏振度误差在3.5%以内,满足了天空偏振探测的应用.非线性最小二乘拟合法可以有效的标定分振幅偏振成像探测器.In the calibration process of the amplitude-division polarization imaging detector,a nonlinear least squares fitting method was proposed to solve the problem of strong coupling between the error introduced by the calibration system and the super-influencing factors of the detector′s own error. It substituted the main factors affecting the errors of the detector and the calibration system into the fitting equation in the form of unknown parameters for calibration calculations. The accuracy of the calibrated detector was verified under an incident light source with a wavelength of 532 nm. The polarization angle error of detecting linearly polarized light is below 0.2°,and the linear polarization error is below 2.5%,the circular polarization error of detecting left-right circularly polarized light is below 3.5%,which satisfies the application of sky polarization detection. It can be seen that the nonlinear least squares fitting method can effectively calibrate the amplitude-division polarization imaging detector.

关 键 词：偏振光学 分振幅偏振成像探测器 标定 偏振成像 非线性最小二乘拟合法 

分 类 号：P161.3[天文地球—天文学] TP751.1[自动化与计算机技术—检测技术与自动化装置]